Paperclip: Cross-tenant agent API token minting via missing assertCompanyAccess on /api/agents/:id/keys

Isolated paperclip instance running in authenticated mode default config on a clean Docker image matching commit b649bd4 2026.411.0-canary.8, post the 2026.410.0 patch. This advisory was verified on an unmodified build. Summary POST /api/agents/:id/keys, GET /api/agents/:id/keys, and DELETE...